Novel Piezoelectric Mechanism Based on Depolarising Field in Nano-structured Ferroelectrics

2017 Fiscal Year Final Research Report

• Project/Area Number: 26709047
• Research Category: Grant-in-Aid for Young Scientists (A)
• Allocation Type: Partial Multi-year Fund
• Research Field: Inorganic materials/Physical properties
• Research Institution: Nagoya University
• Principal Investigator: Yamada Tomoaki 名古屋大学, 工学研究科, 准教授 (80509349)
• Project Period (FY): 2014-04-01 – 2018-03-31
• Keywords: 誘電体 / ナノ構造

Outline of Final Research Achievements

In this study, we focused on ferroelectric nanorods, which can be expected to show different influence of the depolarising field on the domain structure and piezoelectric property as compared with thin films due to the different dimensionality. We experimentally and theoretically investigated them by using Pb(Zr,Ti)O3 [PZT] nanorods with different orientation, size (width) and electrostatic conditions. It was found that the domain fraction of (100)/(001)PZT nanorods can be varied by their size and electrostatic conditions. Furthermore, the polarization-inclined (111)PZT nanorods showed the enhanced piezoelectric response, which can be explained by the depolarising field.

Free Research Field

誘電体薄膜・表面界面物性